The temperature being reported on the browser interface is mainly the disk temperature (or an average of those temperatures if the device has more than one drive). It's natural for a Terra to report higher temps than a Compact Terra given that it has 4 disks rather than one. Those multiple disks generate a little more heat than the single disk in the Compact Terra.
But as Jim states above, the number is largely irrelevant as long as it's indicating in the green zone.
But as Jim states above, the number is largely irrelevant as long as it's indicating in the green zone.